Pillarization of layer double hydroxides (Mg/Al) with keggin type K4[α-SiW12O40]•nH2O and its application as adsorbent of procion red dye
Year: 2017
Type: article
Abstract: Pillarization of layered double hydroxides with polyoxometalate K 4 [α-SiW 12 O 40 ]•nH 2 O at various times i.e. 3, 6, 9, 12, 24, 36 and 48 hours has been done. The pillared product was characterized by FT-IR spectrophotometer and XRD. The optimum pillared layered double hydroxides of polyoxometalate K 4 [α-SiW 12 O 40 ]•nH 2 O was used as an adsorbent of procion red dye. The results of characterization using FT-IR spectrophotometer is not yet show the optimum pillarization process. The characterisation using XRD the successfully of pillared layered double hydroxides of polyoxometalate K 4 [α-SiW 12 O 40 ]•nH 2 O showing the existence of diffraction angle 8.5 o with intensity 355. Furthermore, the pillared layered double hydroxides of polyoxometalate K 4 [α-SiW 12 O 40 ]•nH 2 O with time variation of 12 hours was applied as an adsorbent of procion red dye. The results show the adsorption rate was 0.523 min -1 , the highest of absorption capacity at 70 o C was 10.8 mol/g, the highest energy of absorption 70 o C was 125 kJ/mol. The enthalpy (∆H) and entropy (∆S), decrease as the increasing concentration of procion red dye. Keywords: layered double hydroxides, polyoxometalate, pillaration, procion red, adsorption
Source: Science & Technology Indonesia
Institution: Sriwijaya University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $200
Funder: Universitas Sriwijaya
OpenAlex ID: W2775374599